  import Vue from 'vue'
  import Vuex from 'vuex'
  Vue.use(Vuex) // 使用Vuex
   export default new Vuex.Store({
        state: {
            count: 0
       },
        mutations: {
          increment(state) {
           state.count++
          }
        },
       actions: {},
       modules: {}
   })